1a7d2d98cSAlistair Francis /* 2a7d2d98cSAlistair Francis * QEMU lowRISC Ibex UART device 3a7d2d98cSAlistair Francis * 4a7d2d98cSAlistair Francis * Copyright (c) 2020 Western Digital 5a7d2d98cSAlistair Francis * 6a7d2d98cSAlistair Francis * Permission is hereby granted, free of charge, to any person obtaining a copy 7a7d2d98cSAlistair Francis * of this software and associated documentation files (the "Software"), to deal 8a7d2d98cSAlistair Francis * in the Software without restriction, including without limitation the rights 9a7d2d98cSAlistair Francis * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10a7d2d98cSAlistair Francis * copies of the Software, and to permit persons to whom the Software is 11a7d2d98cSAlistair Francis * furnished to do so, subject to the following conditions: 12a7d2d98cSAlistair Francis * 13a7d2d98cSAlistair Francis * The above copyright notice and this permission notice shall be included in 14a7d2d98cSAlistair Francis * all copies or substantial portions of the Software. 15a7d2d98cSAlistair Francis * 16a7d2d98cSAlistair Francis * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17a7d2d98cSAlistair Francis * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18a7d2d98cSAlistair Francis * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19a7d2d98cSAlistair Francis * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20a7d2d98cSAlistair Francis * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21a7d2d98cSAlistair Francis * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22a7d2d98cSAlistair Francis * THE SOFTWARE. 23a7d2d98cSAlistair Francis */ 24a7d2d98cSAlistair Francis 25a7d2d98cSAlistair Francis #ifndef HW_IBEX_UART_H 26a7d2d98cSAlistair Francis #define HW_IBEX_UART_H 27a7d2d98cSAlistair Francis 28a7d2d98cSAlistair Francis #include "hw/sysbus.h" 29a7d2d98cSAlistair Francis #include "chardev/char-fe.h" 30a7d2d98cSAlistair Francis #include "qemu/timer.h" 31db1015e9SEduardo Habkost #include "qom/object.h" 32a7d2d98cSAlistair Francis 33a7d2d98cSAlistair Francis #define IBEX_UART_TX_FIFO_SIZE 16 34940aabb9SAlistair Francis #define IBEX_UART_CLOCK 50000000 /* 50MHz clock */ 35a7d2d98cSAlistair Francis 36a7d2d98cSAlistair Francis #define TYPE_IBEX_UART "ibex-uart" 378063396bSEduardo Habkost OBJECT_DECLARE_SIMPLE_TYPE(IbexUartState, IBEX_UART) 38a7d2d98cSAlistair Francis 39db1015e9SEduardo Habkost struct IbexUartState { 40a7d2d98cSAlistair Francis /* <private> */ 41a7d2d98cSAlistair Francis SysBusDevice parent_obj; 42a7d2d98cSAlistair Francis 43a7d2d98cSAlistair Francis /* <public> */ 44a7d2d98cSAlistair Francis MemoryRegion mmio; 45a7d2d98cSAlistair Francis 46a7d2d98cSAlistair Francis uint8_t tx_fifo[IBEX_UART_TX_FIFO_SIZE]; 47a7d2d98cSAlistair Francis uint32_t tx_level; 48a7d2d98cSAlistair Francis 49*82a4ed8eSAlexander Wagner uint32_t rx_level; 50*82a4ed8eSAlexander Wagner 51a7d2d98cSAlistair Francis QEMUTimer *fifo_trigger_handle; 52a7d2d98cSAlistair Francis uint64_t char_tx_time; 53a7d2d98cSAlistair Francis 54a7d2d98cSAlistair Francis uint32_t uart_intr_state; 55a7d2d98cSAlistair Francis uint32_t uart_intr_enable; 56a7d2d98cSAlistair Francis uint32_t uart_ctrl; 57a7d2d98cSAlistair Francis uint32_t uart_status; 58a7d2d98cSAlistair Francis uint32_t uart_rdata; 59a7d2d98cSAlistair Francis uint32_t uart_fifo_ctrl; 60a7d2d98cSAlistair Francis uint32_t uart_fifo_status; 61a7d2d98cSAlistair Francis uint32_t uart_ovrd; 62a7d2d98cSAlistair Francis uint32_t uart_val; 63a7d2d98cSAlistair Francis uint32_t uart_timeout_ctrl; 64a7d2d98cSAlistair Francis 65940aabb9SAlistair Francis Clock *f_clk; 66940aabb9SAlistair Francis 67a7d2d98cSAlistair Francis CharBackend chr; 68a7d2d98cSAlistair Francis qemu_irq tx_watermark; 69a7d2d98cSAlistair Francis qemu_irq rx_watermark; 70a7d2d98cSAlistair Francis qemu_irq tx_empty; 71a7d2d98cSAlistair Francis qemu_irq rx_overflow; 72db1015e9SEduardo Habkost }; 73a7d2d98cSAlistair Francis #endif /* HW_IBEX_UART_H */ 74